Queensland Education Minister John-Paul Langbroek says he will investigate claims there was a long delay in reporting the discovery of asbestos at a Brisbane state school.

Parts of the grounds at the Graceville State School in the city's south-west have been restricted to allow for repairs and further testing.

A meeting at the school last night heard asbestos was first discovered by a contractor in May, but not reported to Education Queensland until this month.

Mr Langbroek says the matter will be closely examined.

"It would be a question for everyone if any asbestos is found and located, then it's really important of course that we lock down the situation as the principal did yesterday and then investigate it," he said.

"We'll make sure we look into the details of what happened at that parents and community meeting and make sure we advise everyone of the circumstances."